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- /* global screenReaderText */
- /**
- * Theme functions file.
- *
- * Contains handlers for navigation and widget area.
- */
- ( function( $ ) {
- var $body, $window, $sidebar, adminbarOffset, top = false,
- bottom = false, windowWidth, windowHeight, lastWindowPos = 0,
- topOffset = 0, bodyHeight, sidebarHeight, resizeTimer,
- secondary, button;
- function initMainNavigation( container ) {
- // Add dropdown toggle that display child menu items.
- container.find( '.menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' );
- // Toggle buttons and submenu items with active children menu items.
- container.find( '.current-menu-ancestor > button' ).addClass( 'toggle-on' );
- container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
- container.find( '.dropdown-toggle' ).click( function( e ) {
- var _this = $( this );
- e.preventDefault();
- _this.toggleClass( 'toggle-on' );
- _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
- _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
- _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
- } );
- }
- initMainNavigation( $( '.main-navigation' ) );
- // Re-initialize the main navigation when it is updated, persisting any existing submenu expanded states.
- $( document ).on( 'customize-preview-menu-refreshed', function( e, params ) {
- if ( 'primary' === params.wpNavMenuArgs.theme_location ) {
- initMainNavigation( params.newContainer );
- // Re-sync expanded states from oldContainer.
- params.oldContainer.find( '.dropdown-toggle.toggle-on' ).each(function() {
- var containerId = $( this ).parent().prop( 'id' );
- $( params.newContainer ).find( '#' + containerId + ' > .dropdown-toggle' ).triggerHandler( 'click' );
- });
- }
- });
- secondary = $( '#secondary' );
- button = $( '.site-branding' ).find( '.secondary-toggle' );
- // Enable menu toggle for small screens.
- ( function() {
- var menu, widgets, social;
- if ( ! secondary || ! button ) {
- return;
- }
- // Hide button if there are no widgets and the menus are missing or empty.
- menu = secondary.find( '.nav-menu' );
- widgets = secondary.find( '#widget-area' );
- social = secondary.find( '#social-navigation' );
- if ( ! widgets.length && ! social.length && ( ! menu || ! menu.children().length ) ) {
- button.hide();
- return;
- }
- button.on( 'click.twentyfifteen', function() {
- secondary.toggleClass( 'toggled-on' );
- secondary.trigger( 'resize' );
- $( this ).toggleClass( 'toggled-on' );
- if ( $( this, secondary ).hasClass( 'toggled-on' ) ) {
- $( this ).attr( 'aria-expanded', 'true' );
- secondary.attr( 'aria-expanded', 'true' );
- } else {
- $( this ).attr( 'aria-expanded', 'false' );
- secondary.attr( 'aria-expanded', 'false' );
- }
- } );
- } )();
- /**
- * @summary Add or remove ARIA attributes.
- * Uses jQuery's width() function to determine the size of the window and add
- * the default ARIA attributes for the menu toggle if it's visible.
- * @since Twenty Fifteen 1.1
- */
- function onResizeARIA() {
- if ( 955 > $window.width() ) {
- button.attr( 'aria-expanded', 'false' );
- secondary.attr( 'aria-expanded', 'false' );
- button.attr( 'aria-controls', 'secondary' );
- } else {
- button.removeAttr( 'aria-expanded' );
- secondary.removeAttr( 'aria-expanded' );
- button.removeAttr( 'aria-controls' );
- }
- }
- // Sidebar scrolling.
- function resize() {
- windowWidth = $window.width();
- if ( 955 > windowWidth ) {
- top = bottom = false;
- $sidebar.removeAttr( 'style' );
- }
- }
- function scroll() {
- var windowPos = $window.scrollTop();
- if ( 955 > windowWidth ) {
- return;
- }
- sidebarHeight = $sidebar.height();
- windowHeight = $window.height();
- bodyHeight = $body.height();
- if ( sidebarHeight + adminbarOffset > windowHeight ) {
- if ( windowPos > lastWindowPos ) {
- if ( top ) {
- top = false;
- topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
- $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
- } else if ( ! bottom && windowPos + windowHeight > sidebarHeight + $sidebar.offset().top && sidebarHeight + adminbarOffset < bodyHeight ) {
- bottom = true;
- $sidebar.attr( 'style', 'position: fixed; bottom: 0;' );
- }
- } else if ( windowPos < lastWindowPos ) {
- if ( bottom ) {
- bottom = false;
- topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
- $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
- } else if ( ! top && windowPos + adminbarOffset < $sidebar.offset().top ) {
- top = true;
- $sidebar.attr( 'style', 'position: fixed;' );
- }
- } else {
- top = bottom = false;
- topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
- $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
- }
- } else if ( ! top ) {
- top = true;
- $sidebar.attr( 'style', 'position: fixed;' );
- }
- lastWindowPos = windowPos;
- }
- function resizeAndScroll() {
- resize();
- scroll();
- }
- $( document ).ready( function() {
- $body = $( document.body );
- $window = $( window );
- $sidebar = $( '#sidebar' ).first();
- adminbarOffset = $body.is( '.admin-bar' ) ? $( '#wpadminbar' ).height() : 0;
- $window
- .on( 'scroll.twentyfifteen', scroll )
- .on( 'load.twentyfifteen', onResizeARIA )
- .on( 'resize.twentyfifteen', function() {
- clearTimeout( resizeTimer );
- resizeTimer = setTimeout( resizeAndScroll, 500 );
- onResizeARIA();
- } );
- $sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll );
- resizeAndScroll();
- for ( var i = 1; i < 6; i++ ) {
- setTimeout( resizeAndScroll, 100 * i );
- }
- } );
- } )( jQuery );
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